Help identifying this chip - battery controller chip ?

[Gabriel]

What chip is the large sn0710031 ?

[Spork Schivago]

Re: Help identifying this chip - battery controller chip ?

I believe it's made by Texas Instrument and I couldn't find any datasheets on the chip. When I searched for it though, I found an Enhanced Product Hex Buffer/Driver With Open-Drain Outputs ( http://www.alibaba.com/product-detai...680448902.html ). SN74LVC07A-EP lists your sn0710031 as a related part number0. Here's a datasheet for the SN74LVC07A-EP https://cdn.badcaps-static.com/pdfs/...d50210e6ea.pdf

I've contacted TI to see if they can help identify it. Hopefully they'll respond soon with a link to a datasheet or something.
Hope this helps.

[stj]

Re: Help identifying this chip - battery controller chip ?

i doubt that - it's probably a microcontroller with a serial port given it's acting as a charge controller.

[Spork Schivago]

Re: Help identifying this chip - battery controller chip ?

i doubt that - it's probably a microcontroller with a serial port given it's acting as a charge controller.

Yeah, before you replied, I thought the same and modified my statement. We must of been cross posting or whatever it's called. I still think it's made by TI though and hopefully they'll respond soon.

[Spork Schivago]

Re: Help identifying this chip - battery controller chip ?

Got a response from TI. I'll just copy and paste what they said Gabriel...

You can look up part marking on a tool on our website. I have looked up the part and this is what I got: http://www.ti.com/packaging/docs/partlookup.tsp#divline

Part number | Marking | Package | pins Status | Description

LP38842T-1.2/NOPB LP38842T-1.2 KC | 5 ACTIVE 1.5A Ultra Low Dropout Linear Regulators
LP38842T-1.5/NOPB LP38842T-1.5 KC | 5 ACTIVE 1.5A Ultra Low Dropout Linear Regulators
TL4242TDRJRQ1 4242T DRJ | 8 ACTIVE Automotive Adjustable LED Driver

I know the formatting is a little hard to read. Couldn't figure out how to add a grid. It's | separated.

As you can see, none of them have 30 pins like your chip. So now I'm questioning whether it's actually TI or not. Sorry. Wish I could be more helpful.

[Gabriel]

Re: Help identifying this chip - battery controller chip ?

Thanks for all your effort Spork Schivago - I didn't manage to find anything either.

[kc8adu]

Re: Help identifying this chip - battery controller chip ?

its a battery fuel gauge chip.
probably house marked.
is that a dell raid backup battery?
i tore up a bunch for the cells.
its probably ti/benchmarq though.

[Gabriel]

Re: Help identifying this chip - battery controller chip ?

Yes it is a Dell raid battery - I have a Lsi 9260-8i and their battery cost 227$ here in Norway and as these Dell Perc 6 batteries has the same pinout and battery plug as Lsi and as the Perc 6 raid card is made by Lsi I thought I could swap them but 9260 card does not see the battery.

I was hoping that there was a small eprom that could be changed to match Lsi data.

Pinout is data,clock,-,T,+ see picture.

[fzabkar]

Re: Help identifying this chip - battery controller chip ?

The date codes on the chips should tell you when the IC (controller?) was manufactured. The markings are consistent with TI markings, AFAICT.

I would determine the controller's supply and ground pins. I would also trace the data, clock, and T signals from the connector to the controller.

Also determine where the temperature sensor (thermistor?) goes. That would be an ADC input to the controller. In fact ISTM that the entire circuit should not be too difficult to trace.

Once you have this information, then we could go to the Wayback Machine and determine which ICs were available at that time.

http://web.archive.org/web/*/http://www.ti.com

[Spork Schivago]

Re: Help identifying this chip - battery controller chip ?

The date codes on the chips should tell you when the IC (controller?) was manufactured. The markings are consistent with TI markings, AFAICT.

I would determine the controller's supply and ground pins. I would also trace the data, clock, and T signals from the connector to the controller.

Also determine where the temperature sensor (thermistor?) goes. That would be an ADC input to the controller. In fact ISTM that the entire circuit should not be too difficult to trace.

Once you have this information, then we could go to the Wayback Machine and determine which ICs were available at that time.

http://web.archive.org/web/*/http://www.ti.com

I thought it was a TI IC as well, but when I contacted them, they couldn't seem to provide any useful information about it. Only ones they showed that had a bit of a match had the wrong number of pins and just didn't seem to make sense for the type of circuit it was. Maybe it's just discontinued and they don't have the information in their database?

[fzabkar]

Re: Help identifying this chip - battery controller chip ?

As has already been suggested, the chip is probably "house marked". That is, the chip is probably a custom part made for Dell. ISTR that "SN" was a prefix that was commonly assigned to such custom parts. If it is a custom chip, then TI would be prohibited from releasing proprietary data to you, as such data would be the property of Dell.

[Spork Schivago]

Re: Help identifying this chip - battery controller chip ?

Oh! I understand now! When you said house mark, for some reason, I thought you meant it was marked in such a way where only the people who made it, TI, would know what the markings meant. Sorry for the confusion and thanks for the clarification!

[Gabriel]

Re: Help identifying this chip - battery controller chip ?

Is there any smart way to remove the silkscreen ? can barely follow the traces, tried a fiber pen but it was too fine to polish it away.

[fzabkar]

Re: Help identifying this chip - battery controller chip ?

I found a whole bunch of "SN0" ICs in the following TI list:

http://focus.ti.com.cn/cn/download/a...alldevices.txt

Strangely, Mouser lists a SN0708100P device. If it is a proprietary OEM part, then I can't understand why Mouser would be able to sell it.

http://au.mouser.com/ProductDetail/T...ts/SN0708100P/

[Gabriel]

Re: Help identifying this chip - battery controller chip ?

I finally got hold of two defect Lsi battery modules for free to play with.

Boy howdy was I lucky, no sn0710031 on this board but a TI bq2060a using an external eeprom. So instead of trying to modify the Dell unit I will use the Lsi modules by replacing batteries and perhaps reprogram the eeprom.

The Dell and Lsi units use two different batteries, both batteries are Li ion but they have different capacities and the Samsung battery has a hard metal case as the Sony US503759 a8h has the regular softer package.

Sony battery is 1350mAh and Samsung is 2000mAh.
Can I use the Samsung ICP103450S battery on the Lsi board or will it catch fire ?


I can perhaps dump the eeprom content and I should perhaps be able to zero it out to make sure a new battery will be charged properly, if you see the pictures the defective battery has only 385mAh left,eeprom also holds serial number, manufacturer information and design capacity.

Anyone good at hex editing ?


Added some of the datasheets for you, could not find Sony battery datasheet.

[fzabkar]

Re: Help identifying this chip - battery controller chip ?

If you can read and write the EEPROM, I could have a go at editing it.

[kc8adu]

Re: Help identifying this chip - battery controller chip ?

or use a power supply to keep the controller alive and live swap the cell.most will recal on a full cycle.
btw the cell is cheap and easy to get in the form of a samsung blackjack extended battery.$4 on ebay.got a ton of em in my extended family in harbor freight magnet lights with a tp4056 board.

[fzabkar]

Re: Help identifying this chip - battery controller chip ?

I got curious ...

FDW2511NZ, Fairchild, Dual N-Channel 2.5V Specified PowerTrench MOSFET, 20V, 7.1A:


24LC01B, Microchip, marking 4L1BI, 1Kbit, I2C, serial EEPROM, 2.5 - 5.5V:
https://cdn.badcaps-static.com/pdfs/...c3cf891b16.pdf

bq2060A, Texas Instruments, SBS v1.1-Compliant Gas Gauge IC:
https://cdn.badcaps-static.com/pdfs/...43804650eb.pdf

SN74LVC1G08, Texas Instruments, marking CEH, Single 2-Input Positive-AND Gate, 1.65V to 5.5V:
https://cdn.badcaps-static.com/pdfs/...b92049dee8.pdf

Si7108DN, Vishay Siliconix, N-Channel Fast Switching MOSFET, 20V, 14A:
https://cdn.badcaps-static.com/pdfs/...fb551f6ef1.pdf

MAX835EUK-T, Maxim, marking AAAY, Micropower Latching Voltage Monitor, SOT23-5:
https://cdn.badcaps-static.com/pdfs/...9619a44ad0.pdf

MAX1725EUK+T, Maxim, marking ADNK, SOT23, Adj 1.5V to 5.0V, 2.5V - 12V, Ultra-Low IQ, LDO Linear Regulator:
https://cdn.badcaps-static.com/pdfs/...8ac5ffd395.pdf

SFH-0412A, Sony, Self Control (SC) Protector, marking 12AH1, 12A, 4.0V/7.1V:
https://cdn.badcaps-static.com/pdfs/...715af27c24.pdf

[Gabriel]

Re: Help identifying this chip - battery controller chip ?

or use a power supply to keep the controller alive and live swap the cell.most will recal on a full cycle.
btw the cell is cheap and easy to get in the form of a samsung blackjack extended battery.$4 on ebay.got a ton of em in my extended family in harbor freight magnet lights with a tp4056 board.

Controller is still in box so no data to be lost - the Samsung batteries I have is brand new and unused so I hope to be able to use them.

If you can read and write the EEPROM, I could have a go at editing it.

Hehe I thought I had a msop adapter but I did not - got a few on its way, expect a week before I can upload bin file.

Anyone up to date on battery chemistry ? I'm worried about cut off voltage and charging current to be incompatible with the Samsung battery. Are they compatible ?

[Gabriel]

Re: Help identifying this chip - battery controller chip ?

Seems like the Lithium Ion and Lithium Polymer batteries are charged the same way, thumbs up.

Despite the structural differences, you should treat them similarly and consider them two
versions ('gentle and light' 'tough and strong') of the same kind of battery.

No regrets buying the stick wise - nice tool to have for small boards.